Arch of aorta lies in which mediastinum?
**Core Concept**
The arch of aorta is a part of the aortic root that arises from the left ventricle. It is a vital structure that supplies oxygenated blood to the head and upper limbs. The mediastinum is the central part of the chest cavity that contains the heart, great vessels, and other vital structures.
**Why the Correct Answer is Right**
The arch of aorta is located in the superior mediastinum. This is because it arises from the left ventricle and passes upwards to supply the head and upper limbs. The superior mediastinum is the upper part of the mediastinum that contains the aortic arch, brachiocephalic trunk, and other vital structures.
* **Option A:** The middle mediastinum is incorrect because it contains the heart, trachea, and bronchi, but not the arch of aorta.
* **Option B:** The inferior mediastinum is incorrect because it contains the heart, pericardium, and other structures, but not the arch of aorta.
* **Option C:** The anterior mediastinum is incorrect because it contains the thymus gland and other structures, but not the arch of aorta.
**Clinical Pearl / High-Yield Fact**
The arch of aorta is a critical structure that can be affected by various conditions such as aortic dissection, atherosclerosis, and trauma. It is essential for medical students to remember the location of the arch of aorta in the mediastinum to diagnose and manage related conditions effectively.
**Correct Answer:** C. The superior mediastinum.